Friction shock absorber for railway car trucks



y 15, 1952 R. J. OLANDER 2,603,479

FRICTION SHOCK ABSORBER FOR RAILWAY CAR TRUCKS Filed April 21, 1950 I 2 SHEETS SHEET l 7 11 9- 4 ll C \Q/ a n jdpmfiiiii" July 15, 1952 J OLANDER I 2,603,479

FRICTION SHOCK ABSORBER FOR RAILWAY CAR TRUCKS Filed April 21, 1950 2 SHEETS--SHEET 2 I Patented July 15, i952 Q.. l V Roland Delaware Application Apri z 1950,

Claims.

"This invention relates to improvements in friction shock absorbers, especially adapted for use in 'connection'with truck springs ofrailway cars for snubbing the 'action of the springs.

One object of the invention is to provide a friction shock absorber of the character indi-' can TRUCKS J Olander, Chicago, 1 11., assignoi' toW.: H. Miner, Inc., Chicago, -Ill.,

a corporation of Serial No. 157,329 j in sliding engagement with the friction surface cated,. comprising relatively lengthwise movablefriction posts in sliding'frictional contact with each other, and'a coil spring surrounding the posts and yieldingly opposing lengthwise movement of the sametoward each other, wherein the posts are pressed into tight frictional engagement'with each other by rubber pads under initial compression, interposed between the outer sides of theposts andthe inner side of the coil.

spring.

Other-objects of theinvention will more clearly appear from the description and claims hereinafter following. I

I Inlthe accompanying drawings forming a part of this specification, Figure 1 isa top plan view o'f my improved friction shock absorber.- I Figure 2'is'a transverse, vertical sectional view, corresponding substantially to the line 22 of Figure 1-." Figure 3 is'a horizontal sectional'view, correspondingsubstantially to the line 3-3 of-Figure 2. Figure 4 is an outside elevational view of the liner at the right hand side of Figure 2, looking from right to left in said figure. Figure 5 is a view similar to Figure 1, illustrating another embodiment of the invention. Figure 6 is a transverse, vertical sectional view, corresponding substantially to the line 6-6 of Figure 5. Figure 7 is ahorizontal sectional :view, corresponding substantially to the line 1--1 of Figurelfi. I

Referring first to the embodiment of the invention illustrated in Figures 1 to 4 inclusive, my imprqyed shock absorber comprises broadly top andbottom followers A-A, top and bottom friction posts B- -B, a spr1ng C, top. and bottomrubher pads D+-D, andtop and bottom metal liner platesEe-E The top and bottom followers AA are of the same design, each being in the form of a heavy metal disc. The top and bottom posts 3-3 are formed integral with the followers A-A, the top post B depending from the top follower A and the bottom post 13 upstanding from the'bottom follower A. At the inner end of each post 13, the corresponding follower A is provided with a central, cylindrical boss In which forms the base of the post, and serves as a centering means for the spring C. Each post 13 is in the formof a relatively thick, flat plate, having a lengthwise extending, flat friction surface Ii on its inner side ll of the otherpost. s

The spring C is in the form of 'a helical coil, surrounding the posts BB. The top and bottom ends of the springC bear on the top and bottom followers A-A,- respectively. The spring C:

yieldingly opposes relative movement of the followers toward each other:

.The rubber pads D--D are interposed between the inner sides of the spring C and the outer sides 7 of the postsB-B', each pad being in the form'of a block having a flat inner side l2 which bears on the outer side of the' corresponding post B. The outer side of each block is transversely curved, .as indicated at l3, to bear truly on the inner side of the corresponding liner plate E,

which. is interposed between the inner side of the spring and said padD. The pad D is preferably bonded to the liner plate .E by being vulcanized to the same. The body portion of each liner plate E is transversely curved to'fit the-curved interior side of the spring C and the curved exterior side of the corresponding pad D.' Each liner plate E has a horiozntal, laterally outwardly projecting flange 14 at its outer end, the flange l4 of the top plate being at the upper end thereof and interposed between theupper end of the spring-C and the underneath side of the top follower A, and the flange M of the bottom plate being at the lower end' thereof and interposed between the lower end of the spring C and the top side of the bottom follower A. The rubber. pads D-D are under initial lateral compression and press the posts B--B against each other, being buttressed against the inner side of the spring 0,

and .bottomsprlng follower plates of the cluster of truck springs.

The operation of my improved shock absorber,

as illustrated in Figures 1 to 4 inclusive, is as follows: Upon the spring cluster of the truck of a railway car being compressed between the follower plates of said cluster, the improved shock absorber is compressed therewith, forcing the top follower A and the top post B downwardly with respect to the bottom post B, against the resistance of the spring C, thereby sliding the top post B downwardly on the bottom post B. In addition to the friction thus provided between the posts, frictional resistance is also provided by lengthwise sliding movement of the coils of vention illustrated in Figures 5, 6, and 7, my

improved shock absorber differs from that shown; in Figures 1, 2, 3, and 4 in that the liners between V the rubber pads and the coil spring are omitted I The shock absorber shown in Figures"5,-"6, and 7 comprises broadly top and bottom followers FF,

top and bottom friction posts rG G, aspring.

H, and rubber pads JJ. V

The followers F-F and the posts ti -G are identical with the followers AA and the posts B,'Bl hereinbefore described, the, postsTG?-G; having longitudinally extending. friction surfaces 2n, ,2cen their inner sides which are-in sliding engagement with each other. e j 1 The. spring H is intthe form offa helical; coil' surrounding. the posts G G andlbearing at. its top and; bottom endson the topcand bottom'fol lowers FF, respectively V 1 .v'lherpads JfiJiaresimilar; to the .pads D-.+D hereinbefore described, being in the form of rub-i ber'blockslwhichrare under'initiaLlateral com pressionbetween the spring H and the outer sides of the posts .G./G. The. padsJ-J bear directly on the inner. sidesof the spring, H, as clearly shownrin Eigure 6; and arepreferahly; vulcanizedto the'outer sides of the posts G?GI o In the. operation of. the improvedsl'iock absorber shown in Figure'sfi, 6,.and 7," during both i compression and expansion, ofthe mechanism,

friction'is provided between the postsGfG which 4 on said top and bottom followers; and rubber blocks confined between said posts and the inner sides of said spring, said spring holding said blocks laterally compressed against said posts.

3.- In a friction shock absorber, the combination with top and bottom friction posts relatively movable -'lengthwise of the mechanism with respect to each other, said posts being in sliding engagement with each other; of a spring surrounding said posts and yieldingly opposing relavtive lengthwise movement of the same; rubber blocks under lateral compression confined laterallybetween said posts and inner sides of said spring; andmetalliner plates interposed between and bearing on said blocks and the inner side of said spring.

f1. In a friction shock absorber, the combina tion with top and bottom friction posts relatively movable lengthwise of the mechanism with respect to each other, said posts being in sliding en agement with, each other; of topand bottom followers at the, topv andabottom ends ofzsaid; posts, respectively, said. followers,heinglintegral: with said posts; a con spring surrounding. said posts andbearingatits top-and bottomlendsion said. top and bottom followers; rubber. blocks-unrder lateraljcompression confined laterallyrbe tween said 'posts, and the; inner sides; of.-said.: sprin and metal linerplates intern edbetween; and bearing on said blocks andthei'interior pores tion of, said. spring. ,1 1 i v 5, In a friction shockwabsorber, the; combiner:v tion with top and bottom friction posts'relatively. movable lengthwise, of, the 'II1 ?B 'l. 1i-SI 1QWi lltrfis-; spectto each other;v of top and bottom followers; at the top and bottom ends of said posts; re;- spectively, said followersbeing integral withssaid p st a. oilv spr v s o nd ngv sa d. posts-and. bearing at its top and bottom ends:.:on:said:t0n.

40 and bottom followers; rubber.ibIQcksnndenIateraI are held in .tightfrictional engagement with each other by the; rubber pads-'J--J1 'I claim: j 1 1'; v 1; In a friction shock absorber, the combiner,

tion with top and bottomv friction posts relatively movable lengthwise Of the mechanism: with respect to each 'other;.said posts'being in'sliding.

engagement with 'each' other; of .a spring; sure rounding said posts. and yieldinglyopposing relative lengthwise movementof the same "and rubber blocks confined betweensaidiposts and in! ner sidesof-saidz'spring, sai'dispringrh'olding said blocks laterally compressed" asainstsaidposts;

, 2. In a friction shock absorber, "th'e combinationwithtop and bottom friction posts relatively movable lengthwise of the mechanism' with' respect to each other, said posts being i-ns'liding;

engagein'entwith eachlother; of topand'ib'ottom V followerslat: the "top 'and posts, respectively, said followers being integral with 'said posts; a'coil spring surrounding said posts and bearing at its top andibottom ends bottom' ends "of said J c p sion confin d affielia ly et eensaidhostss and the inner sides of said spring; andtop ande tom e at s n e sed b tween said blocks; and-spring, said-topplate, having,ailange:at' 1 ppe ndbearing n sai t p followerand whi h h u p r nd; r d e-s r ng is;.seated;, said o t la ha ing a: flan e at its Ibottoni: e ri g n ai 'Q t0m; 0 .1oWe1:-.. andaon. which, the, lower end of,sai d;spring is seated; V

, RQLAND EF BEN c e ic; The following references; are: ofrecord in the 2,4 1( ),160 Haseltine Oct. 

